Automatic radio wave output limiting system for portable telephone set

ABSTRACT

To provide a portable telephone system in which use of the set is automatically limited in a site where the use of the set is limited and in which causes of non-response and other various information can be transmitted to an originating party who called the use-limited portable telephone set. The system includes a portable telephone output limiting management device issuing a radio wave signal of the output limiting command information from an antenna. On reception of the output limiting command information from the antenna, the portable telephone set enters into the output limiting mode to halt direct exchange with the base station and sends out the information on the fact that the set has entered into the output limiting mode and the information including the portable telephone set management number, telephone number reply message and a notification information flag to the portable telephone output limiting management device, which then takes the place of the portable telephone set to reply to the call-out from the base station until the time the portable telephone set receiving the output limiting command exits the site.

FIELD OF THE INVENTION

[0001] This invention relates to a wireless portable telephonecommunication system comprising at least a base station and a portabletelephone set as a mobile station connected by a wireless communicationto the base station. More particularly, the invention relates to anautomatic radio wave output limiting system for a portable telephone setespecially in public sites where limitation is imposed on the use of theportable telephone set.

BACKGROUND

[0002] Recently, with rapid increase in the number of users of cellularphone set and mobile information terminals communicating with a basestation by a wireless communication(termed as a portable telephone set),those failing to observe the manner in using the portable telephone setare also increasing in number. In particular, there are passengers inelectric rolling stock who use portable telephone sets despite fact thatthe passengers of the electric rolling stock are requested not to usethe portable telephone sets by announcing.

[0003] In order to cope with the above-described problems, there isproposed in, for example, the JP Patent Kokai JP-A-9-331576 a system inwhich a call inhibiting/limiting station issuing a use limiting signalto portable telephone sets is provided in an area where it is desired tolimit the use of the portable telephone sets, such as hospitals,libraries or museums, and in which means for receiving the use limitingsignal sent out from the call inhibiting/limiting station and means forlimiting the origination/incoming of a call at the time of reception ofthe use limiting signal are provided on the portable telephone set, sothat, when the portable telephone set is moved to a use-limited area andis receiving the use limiting signal, it is possible to suppress theincoming of a call from a base station to the portable telephone set aswell as the transmission from the portable telephone set to the basestation.

SUMMARY OF THE DISCLOSURE

[0004] However, the portable telephone set, the use of which has nowbeen limited by the system proposed in JP Patent Kokai JP-A-9-331576 isvirtually completely disconnected from a mobile communication network,such that, if someone intends to call an owner of the portable telephoneset, a message indicating no response, such as a message running “thetelephone set you are calling is outside the range of arrival of radiowaves or has the power source of the portable telephone set turned offand cannot be called” is returned to the originating party.

[0005] In such case, the originating party (the party intending to callthe portable telephone set) is not in a position to grasp whether theabsence of response from the called portable telephone set is ascribableto the power source being off, the portable telephone set being outsidethe reaching range of radio waves or the portable telephone set is inthe use-limited area.

[0006] There is also presented a problem that, if the owner of theportable telephone set of the system proposed in JP Patent KokaiJP-A-9-331576 is in a use-limited area without recognizing that he orshe is in the use-limited are, the its portable telephone set is unableto receive the incoming call, despite the fact that he or she has notmade an operation of turning his or her portable telephone set off, thatis an operation of relinquishing the call reception, such that he or shecannot have communication with the originating party against his or herintention.

[0007] It is therefore an object of the present invention to provide aportable telephone communication system in which the use of the portabletelephone set is automatically limited in its use in an area wherelimitations on use of the portable telephone set are imposed, such as ina public means of traffics e.g., in electric rolling stocks, or inpublic sites, and in which the causes of the absence of the response andvarious other information can be transmitted to an originator of a callto the use-limited portable telephone set.

[0008] It is another object of the present invention to provide a systemin which incoming of a call is communicated to the portable telephoneset in a use-limited area so that the portable telephone set is able tocommunicate with the originating side after the portable telephone sethas moved to a site where it is permitted to use the portable telephoneset.

[0009] For accomplishing the above object, the present inventionprovides a mobile communication system, comprising: a base station; amobile station terminal; and controlling means for limiting output ofthe mobile station terminal, the controlling means comprising: means forsending a reply message to said base station on reception of a callsignal addressed to said mobile station terminal sent from said basestation, in place of the mobile station terminal , a wirelesscommunication of the mobile station terminal with said base stationbeing limited.

[0010] Also the present invention provides the mobile communicationsystem in claim 1, the controlling means further comprising: means forsending out an output limitation command signal to the mobile stationterminal located in a site where use of the mobile station terminal islimited, means for receiving information containing the reply messagesent back from the mobile station terminal which receives the outputlimitation command signal to enter into an output-limiting mode; andmeans for registering and managing the mobile station terminal as anoutput-limited terminal.

[0011] Further the present invention provides a mobile communicationsystem, comprising: a base station; a mobile station terminal; andcontrolling means for limiting output of the mobile station terminal,the controlling means comprising: means for causing a call incoming toarrive with a low powered radio wave at the mobile station terminal in aoutput-limited mode on reception of said call incoming addressed to themobile station terminal, the means transmitting a reply message inresponse to the incoming to the mobile station terminal in place of themobile station terminal to the base station.

[0012] In accordance with another aspect the present invention providesa portable telephone set output limiting system including a portabletelephone output limiting management device for transmitting a radiosignal message comprising an output limiting command information from afirst antenna provided on a site where use of the portable telephone setis limited. When the portable telephone set enters the site to receivethe output limitation command information transmitted from the firstantenna, the output limiting mode is initiated to halt direct exchangewith a base station to transmit to the first antenna of the portabletelephone output limiting management device a message including the factof entrance to an output cessation mode of-the portable telephone setsand the inherent information including a management member of theportable telephone set, telephone number, a reply message and anotification information flag, if need be, with a low power out putmode. The portable telephone output limiting management device receivesthe inherent information sent out from the portable telephone setthrough the first antenna to update and registers the proper informationin a management table on a portable telephone base. The portabletelephone output limiting management device assumes that the portabletelephone sets registered in the management table as being the portabletelephone sets placed under its control so that subsequently theportable telephone output limiting management device responds to thecall-out from the base station to take the place of the portabletelephone set in the output limited state until the portable telephoneset commanded to be output-limited exits the site.

[0013] The portable telephone output limiting management deviceaccording to the present invention comprises means for sending out anoutput limitation command signal for limiting outputting of radio signalvia a first antenna provided at a site where the use of a portabletelephone set is limited to a portable telephone set located in a sitewhere use of a portable telephone set is limited, and means forreceiving the information inherent in the portable telephone set,transmitted from the portable telephone set which has received theoutput limiting command signal to halt the communication with the basestation so as to be in the output-limited state, via the first antenna,to supervise the portable telephone set in the output-limited statealong with registering the proper information including the callincoming permitting information in a management table. The portabletelephone output limiting management device according to the presentinvention comprises a second transmission/reception antenna for havingwireless communication with the base station and means for automaticallytransmitting to the originating side a reply message to an incoming callto the portable telephone set in the output limiting mode to take theplace of the set. It is noted that the inherent information of theportable telephone set transmitted from the portable telephone set inthe output-limiting mode includes the information on the reply message.

[0014] In accordance with another aspect of the present invention, theportable telephone set also comprises means for limiting the outputtingof the portable telephone set on reception of the output limitationcommand signal from the portable telephone output limiting managementdevice via the first transmission/reception antenna and means fortransmitting the inherent information of the portable telephone set viathe first transmission/reception antenna to the portable telephoneoutput limiting management device when the portable telephone set hasentered into the output limiting mode.

[0015] In accordance with a further aspect of the present invention, theportable telephone output limiting management device also comprisesmeans for transmitting an output limiting command signal via a firstantenna provided in a site where use of the portable telephone set islimited to a portable telephone set located in the site where use of theportable telephone set is limited, means for receiving an inherentinformation of the portable telephone set transmitted from the portabletelephone set which has received the output limiting command signal tohalt radio communication with a base station so as to be in theoutput-limited state, via the first antenna, to register and supervisethe portable telephone set in the output limited state along with theinherent information and an incoming call permitting information, asecond antenna for having radio communication with the base station andmeans for having reference to the call incoming permitting informationfrom the inherent information received from the portable telephone setand stored in a management table in case of a call incoming to theportable telephone set in the output limiting state and for notifyingthe incoming of the call to the portable telephone set in case ofpermission of the incoming call, and means for sending messageindicating an state of the call incoming in the portable telephone fornotifying the state to an originating side.

[0016] On reception of a pre-set response transmitted from a portabletelephone set via a third antenna provided in the use-permitted site,the portable telephone output limitation management device transmits tothe base station a message as to the portable telephone set being in amoving state until such time as a user of the portable telephone setmoves from the use-limited site to the use-permitted site.

[0017] In accordance with a further aspect of the present invention, ifa pre-set reply transmitted from the portable telephone set is receivedvia the third antenna provided in a use-permitted site, it is assumedthat the portable telephone set has moved to the use-permitted site. Ahandover command then is issued to effect handover process to a radiochannel of an antenna connected to a repeater for the portable telephoneset responsible for establishing connection between the portabletelephone set in the output-limited state and the base station, at thesame time as the transmission of the message indicating the moving stateis halted and a request is made for a radio channel between the basestation and the repeater for the portable telephone set responsive tothe handover command. Still other objects-and advantage of the presentinvention will become readily apparent to those skilled in the art fromthe following detailed description wherein preferred embodiment of theinvention is shown and described. The drawing and description are to beregarding as illustrative in nature and not as restrictive.

BRIEF DESCRIPTION OF THE DRAWINGS

[0018]FIG. 1 illustrates the structure and the operation of the entiresystem of an embodiment of the present invention.

[0019]FIG. 2 shows the structure of a portable telephone output limitingmanagement device in an embodiment of the present invention.

[0020]FIG. 3 shows the structure of a portable telephone output limitingmanagement device in an embodiment of the present invention.

[0021]FIG. 4 shows an example of the contents of a limited portabletelephone information supervising table in an embodiment of the presentinvention.

[0022]FIG. 5 illustrates an embodiment of the present invention.

[0023]FIG. 6 illustrates the structure and the operation of the entiresystem of a second embodiment of the present invention.

[0024]FIG. 7 shows the structure of a portable telephone output limitingmanagement device in the second embodiment of the present invention.

[0025]FIG. 8 shows the structure of a portable telephone output limitingmanagement device in the second embodiment of the present invention.

[0026]FIG. 9 shows an example of the contents of a limited portabletelephone information supervising table in the second embodiment of thepresent invention.

[0027]FIG. 10 shows the structure of a repeater for the portabletelephone set according to a third embodiment of the present invention.

[0028]FIG. 11 shows the path setting (A mode) for a repeater for theportable telephone set according to the third embodiment of the presentinvention.

[0029]FIG. 12 shows the path setting (B mode) for a repeater for theportable telephone set according to the third embodiment of the presentinvention.

[0030]FIG. 13 is a sequence diagram for illustrating the operation of arepeater for the portable telephone set in the third embodiment of thepresent invention.

PREFERRED EMBODIMENTS OF THE INVENTION

[0031] In the following, certain present embodiments of the presentinvention are explained. In preferred forms of the present invention, aradio wave for commanding a cessation of outputting of a radio wave of aportable telephone set from an antenna 3 in a carriage of the electricrolling stock, representing a use-limited site of the portable telephoneset, are emitted to limit the outputting of the portable telephone setin the carriage of the electric rolling stock.

[0032] At the same time as the owner of a portable telephone set 4 goesinto a carriage of the electric rolling stock, the portable telephoneset 4 receives an output stop command signal emitted from the antenna 3as a result of which its basic function, such as voice communication anddata communication, are suppressed.

[0033] When having entered into the output-limited state, the portabletelephone set transmits a message indicating completion of entrance ofthe out put limited sate and the identification information proper tothe portable telephone set, with a low powered radio wave, to a portabletelephone output limiting management device 2. The identificationinformation includes, for example, an identification information for theportable telephone set, telephone number of the portable telephone set,a response message information and a communication information flag forspecifying with which response pattern the portable telephone outputlimiting management device responds to the call from a base station. Theportable telephone output limiting management device 2 then registersthe portable telephone set in the output-limited state in a registrationtable for management purposes.

[0034] If, during a time when the outputting of the portable telephoneset suppressed, there is a incoming call from the base station 5, theportable telephone output limiting management device 2 automaticallysends a reply message indicating that the user is on the electricrolling stock and cannot talk by telephone to take the place of theoutput-limited to an origination portable telephone set 4.

[0035] As the reply message of the automatic response, selection may bemade from several patterns in accordance with setting on a side of theportable telephone set 4.

[0036] On the other hand, in a shinkansen carriage or in a limitedexpress train, use of a portable telephone set is inhibited in a seatedpassenger carriage, while its use is permitted in a deck etc. In apresent second embodiment, incoming of a call is permitted in suchcarriage and call can be continued if the portable telephone set ismoved to a site where the use of the portable telephone set ispermitted.

[0037] Referring specifically to FIG. 6, a portable telephone outputlimiting management device 52 is provided for emitting radio wavesignals of an output limitation command information to limit anoutputting of a radio wave from the portable telephone set via a firstantenna 53 provided in a site of limiting use of a portable telephoneset. When a portable telephone set 54 enters such site, and receives theoutput limitation command information from the first antenna, theportable telephone set switches into the output limitation mode to stopdirect exchange with a base station, while sending out to the firstantenna of the portable telephone output limiting management device,with low powered radio wave, a message comprising a fact that theportable telephone set has entered into the output limiting mode, andthe inherent information including the management number and thetelephone number of the portable telephone set, occasionally withresponse message, communication information flag and an incomingpermission flag.

[0038] The portable telephone output limiting management device 52receives the inherent information from the portable telephone set, viathe first antenna 53, and updatingly registers contents of theinformation in the management table, on a portable telephone set base,and controls the portable telephone set, registered in the managementtable, as being a portable telephone set under its management.

[0039] The portable telephone output limiting management device 52 alsoincludes a second antenna 51 for having radio communication with a basestation 55. If there is an incoming message from the base station 55 tothe portable telephone set 54 in the output-limited state, the portabletelephone output limiting management device 52 makes a reference to anincoming permitting flag, receiving from the inherent information of theportable telephone set and stored in the management table. If the flagindicate the incoming being permitted, the portable telephone outputlimiting management device 52 communicates the state of call incomingfrom the base station 55 to the portable telephone set 54, whiletransmitting a message indicating the fact of the call incoming to thebase station 55 for communication to an originating side.

[0040] In a site 58 where use of a portable telephone set is permitted,there is provided a repeater device 59 for a portable telephone setadapted for establishing a radio channel between the portable telephoneset and the base station and for accepting a radio channel of theoutput-limited portable telephone set based on a handover request fromthe portable telephone output limiting management device.

[0041] On reception of a response to an incoming of a call with a radiowave transmitted with low power from the output-limited portabletelephone set, the portable telephone output limiting management device52 transmits to the base station a message to the effect that the userof the portable telephone set is moving from a use-limited site to ause-permitted site 58 during the time of such movement. If, in thiscase, the portable telephone output limiting management device 52receives a pre-set response (second incoming response) transmitted froma third antenna 57, installed in the use-permitted site 58 and which isconnected to the portable telephone output limiting management device52, the latter judges that the portable telephone set has moved to theuse-permitted site 58, and accordingly issues a hand-over command to aradio channel of the antenna connected to a repeater device 59 for theportable telephone set, while halting the transmission of a messageindicating the fact of movement to the base station.

[0042] In its present embodiment, shown in FIG. 8, the portabletelephone set includes means 138 for discriminating that an outputlimitation signal from the portable telephone output limiting managementdevice is being received, means 134 for automatically returning anidentification information of the portable telephone set entering intothe output limitation mode, and means 139, 140, 141 for detecting theincoming control signal during the output limiting mode to return theincoming information during output limitation.

[0043] [EMBODIMENTS]

[0044] For further illustrating the above-described embodiment of thepresent invention, reference is had to the drawings showing theembodiment.

[0045]FIG. 1 illustrates the overall structure of a communication systemof a first embodiment of the present invention and its operation.Although the present invention can be applied to public transportationand traffic means, such as electric rolling stocks or buses, thefollowing description is made with reference to an embodiment as atypical example in which the present invention is applied to an electricrolling stock or train.

[0046] Referring to FIG. 1, the first embodiment of the presentinvention can generally be classified into two apparatus configurations.One of the configurations is an apparatus made up of an antenna 1outside the carriage, a portable telephone output limiting managementdevice 2 and an antenna 3 within the carriage and which has the functionof limiting the use of the portable telephone set, with the other beinga portable telephone set 4.

[0047] The portable telephone set 4 is arranged to have a function ofreceiving and discriminating an output limitation signal (a signalindicating suppression of outputting of a radio wave) transmitted fromthe portable telephone output limiting management device 2 and afunction of automatically returning an identification information of theportable telephone set.

[0048] It the portable telephone set 4 is outside a carriage 6, that isif the owner is not on board the carriage 6, the portable telephone set4 directly communicates with a base station 5 over a radio channel toreceive services of voice communication. If the owner of the portabletelephone set enters into the carriage 6, the portable telephone set 4receives an output limitation signal (a signal limiting thecommunication with the base station) transmitted from the antenna 1accommodated in the carriage 3 to halt communications by a radio wavewith the base station 5.

[0049] The portable telephone set 4 then transmits a message comprisinga fact of cessation of communication with the base station 5, theportable telephone identification information proper to the portabletelephone set 4, telephone number or voice message, to the portabletelephone output limiting management device 2.

[0050] From this time on, the outputting of any radio wave to a basestation whatsoever of the portable telephone set 4 ceases until it getsout of the carriage 6.

[0051] On reception of the portable telephone identification informationtransmitted from the portable telephone set 4 and other signals, such asthe telephone number or the voice message, via the antenna 6 in thecarriage 6, the portable telephone output limiting management device 2recognizes that the portable telephone set 4 is now under management bythe device 2. From this time on, the portable telephone output limitingmanagement device 2 responds to an incoming call to the portabletelephone set 4 from the base station 5 to take the place of theportable telephone set 4.

[0052]FIG. 2 is a block diagram showing an illustrative structure of theportable telephone output limiting management device 2 in a presentembodiment of the present invention.

[0053] Referring to FIG. 2, a circuit block 29, made up of an antenna inthe carriage (transmitting/receiving antenna) 3, a duplexer 8, areceiver(reception) circuit 9, a transmitting circuit 10, and a channelcodec 11, is designed to communicate with the portable telephone set 4in the carriage 6.

[0054] On the other hand, a circuit block 30 made up of an antennaoutside the carriage 6, a duplexer 13, a receiver circuit 14, a poweramplifier 15, a transmission circuit 16 and a channel codec 17, isdesigned to communicate with the base station 5.

[0055] An output limitation signal outputting circuit 18 sends to thechannel codec 11 digital information command for limiting a transmissionoutput of a radio wave from the portable telephone set. The channelcodec 11 converts the output limiting signal sent from the outputlimitation signal outputting circuit 18 into an information form at thatpermits reception by the portable format telephone set to sends theconverted output limitation signal as transmission digital signals tothe transmission circuit 10. The transmission circuit 10 modulatesand-amplifies the transmission digital signals from the channel codec 11to route the resulting signals to the duplexer 8. The duplexer 8 feedsthe transmission signal from the transmission circuit 10 to the antennain the carriage 7, which then transmits the transmission radio signalfrom the transmission circuit 10 into a space inside of the carriage.

[0056] On the other hand, the antenna in the carriage 3 receives a radiosignal containing information such as a portable telephoneidentification information proper to the portable telephone set,telephone number or voice message, transmitted from the portabletelephone set 4, designed to cope with the portable telephone outputlimiting management device provided in the carriage, and converts thereceived radio signal into electrical signals, which then are routed tothe duplexer 8. The latter then separates the electrical signal sentthereto from the antenna in the carriage 7 to route the separatedelectrical signals to a receiver circuit 9.

[0057] The receiving circuit 9 demodulates the electrical signals sentthereto from the duplexer 8 to convert the demodulated electricalsignals into digital data which is routed to the channel codec 11. Thechannel codec 11 synchronizes the received digital data, fed from thereceiver circuit 9, and extracts an information portion containing theinformation required to send the digital data of the extractedinformation portion to a voice information extraction function unit 19and to a personal information if extraction function unit 20.

[0058] The personal information extraction function unit 20 extracts aportable telephone identification information and a telephone number,from the digital data fed from the channel codec 11, to send theinformation to a limited portable telephone supervising circuit 21.

[0059] The speech information extraction function unit 19 extracts avoice message information from the digital data fed from the channelcodec 11 to send the extracted voice message information to the limitedportable telephone supervising circuit 21.

[0060] The limited portable telephone supervising circuit 21 stores theportable telephone identification information and the telephone number,sent from the personal information extraction function unit 20, and thevoice message information, sent from the speech information extractionfunction unit 19, in a limited portable telephone information managementtable 22, comprised of a storage device.

[0061] In the limited portable telephone information management table22, there are stored, for the totality of the portable telephone sets,for which the output limitation has been made under supervision by theportable telephone output limitation management device 2, portabletelephone identification information, telephone number information, andvoice message information.

[0062]FIG. 4 shows an illustrative structure of the limited portabletelephone information management table 22 in a present embodiment, andschematically shows stored contents of the portable telephoneidentification information, information on the telephone number andvoice message. Referring to FIG. 4, the limited portable telephoneinformation management table 22 is made up of the portable telephoneidentification information, portable telephone number, voice message andflags for the information for communication. The registered contents ofthe limited portable telephone information management table 22 will beexplained subsequently in detail.

[0063] Referring again to FIG. 2, a train operation information storagecircuit 27 accepts data concerning states of operation of vehicles,incessantly changing with time, from a train control device 28, in orderto store latest information at all times.

[0064] The portable telephone output limiting management device 2perpetually monitors the radio wave containing the call information(incoming signals) addressed to the portable telephone sets it ismanaging, in order to return a response to the base station 5 in placeof the portable telephone set 4 in the carriage 6 if the portabletelephone set 4 is called.

[0065] The antenna 1 outside the carriage 6 receives a radio wave fromthe base station 5 and converts it into an electrical signal which issent to the duplexer 13. The duplexer 13 separates the electrical signalsent from the antenna 12 outside the carriage 6 to send the separatedelectrical signal to the a receiver circuit 14, which then demodulatesthe electrical signal sent from the duplexer 13 to send the receiveddigital data to a channel codec 17.

[0066] The channel codec 17 synchronizes the received digital data sentfrom the receiver circuit 14 to extract the information portioncontaining the significant information to send the digital data of theinformation part to a call-out signal detection circuit 25.

[0067] The call signal detection circuit 25 detects the call-out signalto capture the inherent information of the portable telephone set tosend the inherent information of he portable telephone set to acollation circuit 23 for collating the portable telephone set beingsupervised.

[0068] The collation circuit 23 retrieves the limited portable telephoneinformation management table 22, in order to collate whether or not theinformation proper to the portable telephone set sent from the callsignal detection circuit 25 is a call for a portable telephone set it issupervising.

[0069] If the collation circuit 23, retrieving and collating the limitedportable telephone information management table 22, finds that theportable telephone set exhibiting coincidence is under its supervision,the collation circuit 23 sends an information on the supervising numberof the portable telephone set in question and an output command for thereplying message to a reply message assembling circuit 24.

[0070] On reception a reply message output command from the collationcircuit 23, the reply message assembling circuit 24 read out aninformation of the reply message from the limited portable telephoneinformation management table 22, using the supervising number of theportable telephone set as a key.

[0071] The reply message assembling circuit 24 also receives data oncurrent train operating state form the train operation informationstorage circuit 27 to insert the received data in the reply message.

[0072] The reply message assembling circuit 24 assembles the replymessage and synthesizes digital data having of a voice signal format tosend the synthesized digital data to a reply message issuing circuit 26.

[0073] On reception of the digital data of the reply message, the replymessage issuing circuit 26 confirms reception of the incoming of a callsignal from the base station 5 of FIG. 1 and, after sending out a replymessage for a pre-set time duration, such as by repeating the replyannouncement twice, opens a channel used.

[0074] The reply message send-out circuit 26 sends a reply confirmationcontrol signal, digital information of the reply message and the controlsignal for opening the channel, if to the channel codec 17.

[0075] The channel codec 17 converts the digital information and thecontrol signal from the reply message issuing circuit 26 into aninformation format that permits reception by the base station to sendthe signal as a transmission digital signal to a transmission circuit16.

[0076] The transmission circuit 16 modulates and amplifies thetransmission digital signal from the channel codec 17 to send themodulated and amplified signal to the power amplifier 15.

[0077] The power amplifier 15 amplifies the signal received from thetransmission circuit 16 to send the amplified signal to the duplexer 13,which then feeds the signal from the power amplifier 15 to the antennaoutside the carriage 12. The antenna outside the carriage 12 transmits aradio wave containing the reply message signal to the base station 5.

[0078]FIG. 3 shows an illustrative structure of the portable telephoneset 4 according to an embodiment of the present invention. Referring toFIG. 3, the portable telephone set 4 includes an antenna 31, a duplexer32, a receiver circuit 33, a transmission circuit 34, a channel codec35, a speech codec 36, a D/A converter 37, an amplifier 39, a receiver41, an A/D converter 38, an amplifier 40 and a microphone 42.

[0079] A signal transmitted from the antenna 3 in the carriage 6 of FIG.1 for limiting the outputting of a radio wave is received by the antenna31 and converted into electrical signal which is routed to the duplexer32. The duplexer 32 separates the electrical signal fed from the antenna31 to send the separated electrical signal to the receiver circuit 33.The receiver circuit 33 demodulates the electrical signal sent from theduplexer 32 to send the received digital data to the channel codec 35.

[0080] The channel codec 35 synchronizes the received digital data fromthe receiver circuit 33 to extract the information portion containingthe significant information to send the digital data of the informationpart to the speech codec 36 and to an output limiting signal detectioncircuit 44.

[0081] The output limiting signal detection circuit 44 receives thedigital data from the channel codec 35 to check whether or not there isset in the received digital data the information commanding the outputlimitation.

[0082] On detection of the output limiting command information, theoutput limiting signal detection circuit 44 sends a command for limitingtransmission power to an output power limiting circuit 43, while sendinga command for a single tone ringing in order to apprise the owner of theportable telephone set 4 of the fact that the output limitation has beeninitiated. The output limiting signal detection circuit 44 also issues acommands for sending out a identification information containing thetelephone number and the inherent information proper to the portabletelephone set 4 to an automatic personal information response circuit45.

[0083] On reception of the command for transmitting the personalinformation from the output limiting signal detection circuit 44, theautomatic personal information response circuit 45 sends the digitaldata of the personal information to the channel codec 35.

[0084] If data of the voice message is registered in the portabletelephone set from the outset, the automatic personal informationresponse circuit 45 issue a command sending out of the digital data ofthe voice message to a voice message storage circuit 46, after sendingthe digital data of the personal information.

[0085] The voice message storage circuit 46 receives a command forsending out the digital data of the voice message from the automaticpersonal information response circuit 45 to send out the digital data ofthe voice message stored in the channel codec 35.

[0086] The voice message storage circuit 46 stores the digital data ofthe voice message.

[0087] With respect to preparing digital data of the voice message, avoice signal is inputting to the microphone 42 which then converts thespeech into electrical signals to be sent to the amplifier 40. Theamplifier 40 amplifies the voice electrical signals from the microphone42 to send the amplified signals to the A/D converter 38. The lattersamples the analog signals, amplified by the amplifier 40, at e.g., 8kHz for conversion into digital signals which are routed to the speechcodec 36.

[0088] The speech codec 36 encodes the speech using, for example, thevector ring excitation linear prediction encoding system. The speechcodec 36 routes the encoded data to the voice message storage circuit46. The latter stores the digital signals from the speech codec 36. Thetime during which the voice data is to be stored depends on the memorycapacity of the voice message storage circuit 46. In the presentembodiment, it is presupposed that the voice data continuing for threeto five seconds is to be stored.

[0089] The operation of the first embodiment of the present invention isexplained below.

[0090] Referring to FIG. 1, an output limiting signal is transmitted atall times from the antenna in the carriage 3 provided in the electricrolling stock 6. The output limiting signal is sent out at a lowintensity that permits reception only in the carriage, such as attransmission power of about 10 mW. For prohibiting the output limitingsignal from leaking to outside, the window portion of the electricrolling stock 6 is preferably shielded.

[0091] When entering the inside of the electric rolling stock 6, theportable telephone set 4 receives the output limiting command signal,transmitted from the antenna in the carriage 3, to enter the outputlimiting mode. The portable telephone set 4, which has entered into theoutput limiting mode, halts direct data exchange through a wirelesscommunication with the base station 5.

[0092] For indicating to the portable telephone output limitingmanagement device 2 that the output limiting mode has been initiated,the portable telephone set 4 sends out to the antenna in the carriage 3,with an radio wave signal of a low electric power, the fact that theoutput limiting mode has been initiated, and the notification portabletelephone identification information, made up of the supervising numberand the telephone number of the portable telephone set, reply messageand the communication information flag.

[0093] The portable telephone output limiting management to device 2receives, via the antenna in the carriage 3, the information sent out bythe portable telephone set 4 (the fact that the output terminating modehas been initiated and the notification portable telephoneidentification information) to update and register the contents of thelimited portable telephone information management table 22.

[0094] From this time on, the portable telephone output limitingmanagement device 2 recognizing that the portable telephone setregistered in the limited portable telephone information managementtable 22 is to be supervised by the portable telephone output limitingmanagement device responds to a call signal sent from the base station5, in place of the portable telephone set, until the latter exits thecarriage.

[0095] Referring to FIG. 4, there is registered, in the limited portabletelephone information management table 22 in the portable telephoneoutput limiting management device 2, informations on the portabletelephone sets placed under output limitation under the supervision ofthe portable telephone output limiting management device 2.

[0096] The figures from 1 to 15 on the leftmost column denote thesupervising numbers. In the portable telephone output limitingmanagement device 2 of the present embodiment, 15 portable telephonesets can be supervised simultaneously. Of course, the maximum value ofthe supervising number is not limited to 15.

[0097] The portable telephone set supervising information on the nextcolumn is the information proper to the portable telephone sets beingsupervised. When the portable telephone set is called from the basestation, the contents of the inherent information of the portabletelephone set are sent from the base station.

[0098] The portable telephone number is the telephone number of theportable telephone set itself.

[0099] As for the voice message, if the voice digital data for responseis recorded in the portable telephone set from the outset, the portabletelephone output limiting management device 2 takes over the voicedigital data from the portable telephone set 4 to effect storage thereofin this table. Although the alphabetical letters are used forconvenience, it is digital data encoded by the speech codec that areactually recorded.

[0100] The notification information flag is the information specifyingaction pattern with which the portable telephone output limitingmanagement device 2 is to response to a call signal sent from the basestation 5. This notification information flag is stored in the portabletelephone set 4 and which are automatically sent out by the automaticpersonal information response circuit 45. Based on the content of thenotification information flag, the reply message assembling circuit 24in the portable telephone output limiting management device 2 assemblesthe contents of the reply message.

[0101] The contents of the notification information flag has thefollowing meanings: Number: The number of the portable telephone set isnotified. Voice: The voice message is notified. Site: The current siteis notified. Name of Line: The specified electric rolling stock in whichthe portable telephone set is located is notified. None: The automaticresponse function by the portable telephone output limiting managementdevice 2 is suppressed.

[0102]FIG. 5 is a schematic view for illustrating an embodiment of thepresent invention, and schematically shows the running state of aelectric rolling stock embodying the present invention. FIG. 5 showswhich message is returned by the portable telephone output limitingmanagement device 2 depending on the condition of the electric rollingstock. In both the examples 1 and 2, the electric rolling stock is atrain up of Keihin-Tohoku Line. In Example 1 of FIG. 5a, the electricrolling stock is nearing Yokohama station. In Example 2 of FIG. 5b, theelectric rolling stock is running somewhere between Yokohama station andHigashi-Kanagawa station.

[0103] Referring to FIGS. 4 and 5, an example of assembling a responsemessage by the reply message assembling circuit 24 of the portabletelephone output limiting management device 2 is explained. Meanwhile,the operating state of the electric rolling stock is received from thetrain control device 28 so that the latest information is stored at alltimes in the train operation information storage circuit 27. The replymessage assembling circuit 24 optionally acquires the information ontrain operation from the train operation information storage circuit 27.

[0104] Since the communication information flag of the portabletelephone set having the supervising number of ‘4’ is “none”, noresponse is made by the portable telephone output limiting managementdevice 2 even if it detects the call signal addressed to the portabletelephone set with the supervising number of ‘4’. In such case, aroutine non-response message. “The telephone set to which you dialled isnow not live since it is outside the reach of radio waves or has thepower source turned off.” is announced through a mobile communication toan originator network.

[0105] The portable telephone sets having the supervising numbers ‘1’,‘3’, ‘6’ and ‘8’ have the numbers of the communication information flagsON (indicated with circle marks in FIG. 4). On detecting the call to thesupervising number ‘6’, the portable telephone output limitingmanagement device 2 automatically replies by stating “The user is onboard a electric rolling stock and cannot reply by telephone. Pleasephone later on”.

[0106] The portable telephone set with the supervising number of ‘2’ hasthe voice flag and the site of the communication information flag bothON. If the portable telephone output limiting management device 2detects a call to the supervising number ‘2’ and the case is the example1 of FIG. 5a, it automatically responds by stating “This is Satospeaking. I am on board the electric rolling stock and cannot reply. Thetrain is nearing Yokohama station”.

[0107] If the site of the portable telephone set having the supervisingnumber of ‘2’ corresponds to the case of Example 2 of FIG. 5b, theportable telephone output limiting management device 2 automaticallyresponds by stating “This is Sato speaking. I am on board the train andcannot reply. The train is now somewhere between Yokohama station andHigashi-Kanagawa station”.

[0108] The portable telephone sets having the supervising numbers of ‘4’and ‘9’ have the voice flag and the name of the line flag both ON. Ifthe portable telephone output limiting management device 2 detects acall to the supervising number 4, for example, and the case is theexample 1 of FIG. 5a, it automatically responds by stating “This isSuzuki speaking. I am on board the train up of the Keihin-Tohoku lineand cannot reply by telephone”. In the case of example 1 of FIG. 5b,since the name of the line of the train is the same as in example 1, theportable telephone output limiting management device 2 automaticallyresponds by stating “This is Suzuki speaking. I am on board the train upof the Keihin-Tohoku line and cannot reply by telephone”.

[0109] The portable telephone set having the supervising number ‘7’ hasthe voice, current site and the name of line of the communicationinformation flags all ON. If the portable telephone output limitingmanagement device 2 detects a call to the supervising number ‘7’ and thecase is that of example 1 of FIG. 5a, it automatically responds bystating “This is Tanaka speaking. I am on board the train and cannotreply by telephone. The train is a train up of the Keihin-Tohoku lineand is nearing Yokohama station”. If the site of the portable telephoneset having the supervising number ‘7’ is the case of example 2 of FIG.5b, the portable telephone output limiting management device 2automatically responds by stating “This is Tanaka speaking. I am onboard the train and cannot reply by telephone. The train is a train upof the Keihin-Tohoku line and is somewhere between Yokohama station andHigashi-kanagawa station”.

[0110] The portable telephone set 4, placed under supervision by theportable telephone output limiting management device 2, sends out noother than a power downed rads wave as long as it is receiving theoutput limiting command information sent out by the antenna in thecarriage 3. Stated differently, the portable telephone set 4 is not in aposition of directly exchanging data with the base station 5.

[0111] If the portable telephone set exits the carriage, it does receiveany output limiting command information. At this time, the portabletelephone set 4 verifies that it has exited the output-limited area. Inthis case, the portable telephone set 4 transmits its portable telephoneidentification information and the information that it switches from theoutput-limited mode to the normal operating mode, that is an outputlimited mode relinquishing notification, with a medium power, forexample, an output of the order of 50 mW.

[0112] The output limited mode relinquishing notification, issued by theportable telephone set 4 exiting the carriage, is received by theportable telephone output limiting management device 2 via the antennaoutside the carriage 1.

[0113] On reception of the relinquishing notification from the portabletelephone set 4, the portable telephone output limiting managementdevice 2 checks whether or not the portable telephone set which hasissued the relinquishing notification is the portable telephone setunder its supervision. If the result is YES, the portable telephoneoutput limiting management device 2 sends the confirmation of therelinquishing notification to the portable telephone set to delete theinformation on the portable telephone set in question from the limitedportable telephone information management table 22.

[0114] On reception of the confirmation of the relinquishingnotification, the portable telephone set 4 switches from aoutput-limited mode to a normal operating mode and receives a radio wavefrom a base station to effect position registration.

[0115] Although the foregoing embodiment refers to application of thepresent invention to an electric rolling stock, the present inventioncan also be applied to other output-limited sites, such as a cinemahouses theater, hospital or library, in which the use of the portabletelephone set is inhibited or is not desirable as manner. In a cinemahouse or a theater, such a response as “I am enjoying a drama XXX in atheater and cannot reply to the call. The next rest time is from AA hourto BB minute to AA hour to CC minute. Please call during this time” canbe sent to an originator who called the portable telephone set in theoutput-limited state.

[0116] The second embodiment of the present invention is explained. FIG.6 shows the structure of the second embodiment of the present invention.Referring to FIG. 6, the present second embodiment can roughly bedivided into two device configurations, one of which is such a one madeup of an antenna outside the carriage 51, a portable telephone outputlimiting management device 52 and an antenna in the carriage 53 andhaving the functions of limiting the use of the portable telephone setand of advising the portable telephone set in the carriage of the factof incoming of a call from the base station 55 to the portable telephoneset being supervised by the device configuration. The other is aportable telephone set 54.

[0117] The portable telephone set 54 has the function of receiving anddiscriminating an output limitation signal from the portable telephoneoutput limiting management device 52 (signal commanding suppression oftransmitting radio wave) for automatically sending back the portabletelephone identification information.

[0118] The above-described first embodiment is applied with advantage tomeans of public traffic, such as electric rolling stocks or buses, andis particularly effective in case the use of the portable telephone setis inhibited for the entire vehicle.

[0119] On the other hand, the second embodiment is applied withadvantage to the case of a electric rolling stock where the use of theportable telephone set is inhibited in the seated passenger carriage butis permitted in a deck etc, such as on a rain of the shinkansen line orin a limited express train.

[0120] If the portable telephone set 54 is outside the electric rollingstock 56, such as when the owner of the portable telephone set 54 is noton board the electric rolling stock 56, the portable telephone set 54exchanges the information directly with the base station 55 to receiveservices of the speech communication.

[0121] When the portable telephone set 54 is on board the electricrolling stock 56, it receives an output-limited signal transmitted fromthe antenna in the carriage 53 to halt the communication with the basestation 55 over a radio path.

[0122] The portable telephone set 54 then transmits to the portabletelephone output limiting management device 52 the fact that it hashalted wireless communication with the base station 55, and the inherentidentification information for the portable telephone set, as well asthe information on e.g., the telephone number and the voice message.

[0123] From this time on, the portable telephone set 54 is able tooutput a radio wave only at a low powered transmission level until thetime the set 54 exits the call-inhibited carriage of the electricrolling stock 56 (passenger carriage). For example, the outputting ofthe radio wave large than the output of, for example, 10 mW, is halted.

[0124] On reception of the portable telephone identification informationfrom the portable telephone set 54 and signals such as the telephonenumber or the voice message via the antenna in the carriage 53, theportable telephone output limiting management device 52 recognizes thatthe call is incoming to the portable telephone set 54 to await a user ofthe portable telephone set 54 moving to the deck 58.

[0125] If the user of the portable telephone set 54 has moved to thedeck 58, the portable telephone output limiting management device 52causes handover from the portable telephone set 54 to a repeater for theportable telephone set 59. The repeater device for the portabletelephone set 59 receives and amplifies weak radio wave transmitted bythe portable telephone set 54 to send the amplified radio signal to thebase station 55 using an antenna outside the carriage 60 so that theportable telephone set 54 now can have a communication with theoriginating side via the repeater device 59.

[0126]FIG. 7 is a block diagram showing the structure of a portabletelephone output limiting management device 52 according to a secondembodiment of the present invention.

[0127] Referring to FIG. 7, a circuit block 113, made up of an antennain the carriage 72, a duplexer 85, a receiver circuit 86, a transmissioncircuit 87 and a channel codec 88 communicates with a portable telephoneset 54 in the carriage of an electric rolling stock 56. The antenna inthe carriage 72 corresponds to the antenna in the carriage 53 in FIG. 6.

[0128] A circuit block 114, made up of an antenna outside the carriage73, a duplexer 80, a receiver circuit 81, a power amplifier 84, atransmission circuit 82 and a channel codec 83 communicates with thebase station 55 in FIG. 6. The antenna outside the carriage 73corresponds to the antenna outside the carriage 51 in FIG. 6.

[0129] A circuit block 112, made up of an antenna outside the carriage71, a duplexer 89, a receiver circuit 90, a transmission circuit 91 anda channel codec 92 communicates with a portable telephone set 54 in theinside of a deck 58. The antenna outside the carriage 71 corresponds tothe antenna in the carriage 57 in FIG. 6.

[0130] An output limiting signal outputting circuit 93 sends a digitalinformation commanding the output limitation of radio wave of theportable telephone set to the channel codec 88. The channel codec 88converts the output limiting signal from the output limiting signaloutputting circuit 93 into an information format signal that can bereceived by the portable telephone set to send the converted signal tothe transmission circuit 87.

[0131] The transmission circuit 87 modulates and amplifies thetransmission digital signals from the channel codec 88 to send theresulting signal to the duplexer 85. The duplexer 85 transmits thesignal from the transmission circuit 87 to send it to the antenna in thecarriage 72, which then transmits the signal from the transmissioncircuit 87 into the inside of the electric rolling stock.

[0132] The antenna in the carriage 72 receives a radio wave carrying aportable telephone identification information proper to the portabletelephone set and the information such as the telephone number or thevoice message, transmitted by the portable telephone set adapted to copewith the portable telephone output limiting management deviceaccommodated in the electric rolling stock, and converts radio wave intoelectrical signal, which then is sent to the duplexer 85.

[0133] The duplexer 85 separates the electrical signal sent from theantenna in the carriage 72 to send the separated electrical signal tothe receiver circuit 86. The receiver circuit 86 demodulates theelectrical signals sent from the duplexer 85 to convert the demodulatedsignals into digital data which are sent to the channel codec 88.

[0134] The channel codec 88 synchronizes the received digital data sentfrom the receiver circuit 86 to extract an information portion carryingthe significant information to send the digital data of the informationportion to a speech information extraction function unit 100 and to apersonal information extraction function unit 101.

[0135] The personal information extraction function unit 101 extractsthe portable telephone identification information, incoming callpermission information and the information on the telephone number tosend the extracted information to the limited portable telephoneinformation management table 102.

[0136] The speech information extraction function unit 100 extractsinformation on the voice message from the digital data sent from thechannel codec 88 to send the extracted information to the limitedportable telephone information management table 102.

[0137] The portable telephone set identification information and theinformation on the incoming permission flag and the telephone number,sent from the personal information extraction function unit 101, arestored in a limited portable telephone information management table 103.

[0138] The limited portable telephone information management table 103is comprised of a memory device, which is under the supervision by theportable telephone output limiting management device 52, and whichstores the portable telephone set identification information of thetotality of at radio wave outputting limited portable telephone sets,the information on the telephone number and the information on the voicemessage.

[0139]FIG. 9 schematically shows the portable telephone identificationinformation stored by the limited portable telephone informationmanagement table 103, the information on the telephone number, theinformation on the voice message, and a typical incoming call permissionflag as later explained.

[0140] A train operation information storage circuit 109 receives dataon the incessantly changing operating state of the electric rollingstocks from the train control device 111 to store the latest informationat all times.

[0141] The portable telephone output limiting management device 52 ofFIG. 6 perpetually monitors the radio wave carrying the call information(incoming signal) information to the portable telephone set beingsupervised by the own device. If the portable telephone output limitingmanagement device 52 is called out, the portable telephone outputlimiting management device 52 operates differently depending on thecontents of the incoming permission flag stored in the limited portabletelephone information supervising table 103.

[0142] If the incoming permitting flag stored in the limited portabletelephone information supervising table 103 is off, the portabletelephone output limiting management device 52 operates in the samemanner as in the first embodiment described above.

[0143] That is, the portable telephone output limiting management device52 returns a response to the base station 55 to take the place of theportable telephone set 54 in the carriage. The configuration forrealization of this function is as follows:

[0144] It is the antenna outside the carriage 73 of FIG. 7 thatcorresponds to the antenna outside the carriage 73. The antenna outsidethe carriage 73 receives radio wave from the base station 55 of FIG. 6to convert the radio wave into electrical signal which is sent to theduplexer 80. The duplexer 80 separates the electrical signal sent fromthe antenna outside the carriage 73 to send the separated electricalsignal to the receiver circuit 81. The receiver circuit 81 demodulatesthe electrical signal sent from the antenna outside the carriage 73 toroute the received digital data to the channel codec 83. The channelcodec 83 synchronizes the received digital data sent from the receivercircuit 81 to extract the information portion to send the extracteddigital data of the information portion to a call signal detectioncircuit 105. The call signal detection circuit 105 detects the callsignal to capture the information proper to the portable telephone setto send the captured information to the collation circuit 110 for theportable telephone sets being supervised.

[0145] In order to collate whether the information proper to theportable telephone set sent from the call signal detection circuit 105is a call addressed to the portable telephone set supervised by the ownportable telephone output limiting management device, a collationcircuit 110 for the portable telephone set being supervised retrievesthe limited portable telephone information management table 110. If, asa result of collation, the matching circuit 110 for the portabletelephone set being supervised finds that the portable telephone setfound to be coincident is placed under supervision of the own portabletelephone output limiting management device, the collation circuit 110further checks the incoming permission flag of the limited portabletelephone information supervising table 103.

[0146] In the following, the condition under which an incomingpermission flag in the limit portable telephone at management table 110is off is explained.

[0147] Since the incoming flag is off, the portable telephone outputlimiting management device 52 returns a reply to the base station 55 totake the place of the portable telephone set 54.

[0148] The matching circuit 110 sends the information on the supervisingnumber of the portable telephone set in question and an output commandfor a reply message to a reply message assembling circuit 107. Onreception of a reply message output command from the matching circuit110, the reply message assembling circuit 107 captures data of the replymessage from the limited portable telephone information supervisingtable 103, using the supervising number of the portable telephone set asa key. The reply message assembling circuit 107 also receives dataconcerning the current train operating state from a train operatinginformation storage circuit 109 to insert the data into a reply message.The reply message assembling circuit 107 assembles the reply message tosynthesize digital data to be sent out as an image and routes theassembled digital data to a reply message send-out circuit 108.

[0149] The reply message send-out circuit 108, receiving the digitaldata of the reply message, responds to the incoming of the call-outsignal from the base station 55 of FIG. 6 and, after sending out thereply message for a pre-set time interval, for example, after repeatingthe reply message twice, opens the network. The reply message send-outcircuit 108 sends the incoming reply control signal., digitalinformation of the reply information and the control signal for networkopening to the channel codec 83.

[0150] The channel codec 83 converts the digital information and thecontrol signal from the reply message send-out circuit 108 into aninformation format that permits the reception by the base station andsends the resulting information and signals as transmission digitalsignals to a transmission circuit 82. The transmission circuit 82modulates and amplifies the digital signals for transmission from thechannel codec 83 to send the resulting signals to the power amplifier84. The power amplifier 84 amplifies the signals received by thetransmission circuit 82 to send the amplified signals to the duplexer80. The duplexer 80 sends the signals from the power amplifier 84 to theantenna outside the carriage 73. The antenna outside the carriage 73transmits the radio wave carrying the signals from the power amplifier84 to the antenna outside the carriage 73, which then transmits radiowave carrying the reply message to the base station 55.

[0151] On the other hand, if the incoming permitting flag stored in thelimited portable telephone information management table 103 is on, anoperation proper to the second embodiment of the present invention iscarried out.

[0152] That is, the portable telephone output limiting management device52 notifies to the portable telephone set 54 of FIG. 6 that a call isincoming. The portable telephone output limitation management device 52then waits for the user of the portable telephone set 54 to move to thedeck 58 of FIG. 6.

[0153] If the user of the portable telephone set 54 has moved to thedeck 58, hand-over from the portable telephone set 54 to the repeater 59occurs.

[0154] Since the time the portable telephone output limiting ismanagement device 52 communicates the incoming state to the portabletelephone set 54 until the portable telephone set 54 moves to the deck58, the portable telephone output limiting management device 54continues to send the message running: “the portable telephone set ismoving to a place which permits use of the set. Please wait for awhile”. The structure which implements this function is as follows:

[0155] It is the antenna outside the carriage 73 of FIG. 7 thatcorresponds to the antenna outside the carriage 51 of FIG. 7. Theantenna outside the carriage 73 receives radio wave from the basestation 55 to convert it into electrical signal which is sent to theduplexer 80. The duplexer separates the electrical signal sent from theantenna outside the carriage 73 to send the separated electrical signalto the receiver circuit 81. The receiver circuit 81 demodulates theelectrical signal sent from the duplexer 80 to send the received digitaldata to the channel codec 83. The channel codec 83 synchronizes thereceived digital data sent from the receiver circuit 81 to extract theinformation portion to send the extracted digital data of theinformation portion to a call signal detection circuit 106. The callsignal detection circuit 106 detects the call signal to capture theinformation proper to the portable telephone set to send the informationproper to the portable telephone set to the collation circuit 110. Thematching circuit 110 retrieves the limited portable telephoneinformation management table 103 in order to collate whether or not theinformation proper to the portable telephone set is the call to theportable telephone set supervised by the portable telephone outputlimiting management device. If it is found that, as a result ofcollation, the portable telephone set found to be coincident is placedunder supervision of the own portable telephone output limitingmanagement device, the matching circuit 110 further checks the incomingpermission flag of the limited portable telephone information managementtable 103.

[0156] In the following, it is assumed that the incoming permission flagis on.

[0157] Since the incoming flag is on, the matching circuit 110 issues acommand for notifying the portable telephone set of the fact of incomingto an call/incoming response detection circuit 104. In the following, itis assumed that, for convenience, the portable telephone set is aportable telephone set 54 of FIG. 6.

[0158] The call/incoming response detection circuit 104 is responsive tothe command from the collation circuit 110 to generate a control signalfor notifying the incoming to send the generated control signal to thechannel codec 88. The channel codec 88 converts the control signal fromthe call/incoming response detection circuit 104 into an informationform which permits reception by the portable telephone set 54, in orderto send the converted signal as the digital signal for transmission tothe transmission circuit 87. The transmission circuit 87 modulates andamplifies the transmission digital signals from the channel codec 88 tosend the resulting signals to the duplexer 85. The duplexer 85 transmitsthe signals from the transmission circuit 87 to the antenna in thecarriage 72. The antenna in the carriage 72 transmits the radio wavecarrying the incoming information to the portable telephone set 54 tothe portable telephone set 54 of FIG. 6. The radio wave sent out fromthe transmission circuit 87 has its transmission power limited and henceis of a low intensity.

[0159] On reception of the incoming information, the portable telephoneset 54 actuates a vibrator for advising the user of the call incomingstate. A user who has recognized the fact of incoming by the vibrationsof the vibrator presses down the incoming button and moves to a sitewhere a voice communication by the portable telephone set is permitted,such as the deck 58 of FIG. 6, as he or she carries the portabletelephone set 54.

[0160] If there is an incoming call under output limiting control and areply to the incoming call is made by a radio wave to the portabletelephone output limiting management device 52, the portable telephoneset 54 sends out the response with an radio wave of low intensity.

[0161] It is the antenna in the carriage 72 that corresponds to theantenna in the carriage 53 of FIG. 6. The antenna in the carriage 72receives the radio wave from the base station 55 to convert it intoelectrical signals which are sent to the duplexer 80. The duplexerseparates the electrical signals sent from the antenna in the carriage72 to send the separated electrical signals to the receiver circuit 86.The receiver circuit 86 demodulates the electrical signals sent from theduplexer 85 to send the received digital data to the channel codec 83.The channel codec 83 synchronizes the received digital data sent fromthe receiver circuit 86 to extract the information portion containingthe meaningful information to send the extracted digital data of theinformation portion to the call-out/incoming response detection circuit104.

[0162] The call/incoming response detection circuit 104 detects thecontrol signal of the response to the incoming to the collation circuit110, from the information sent from the channel codec 88, to notify tothe collation circuit 110 that a response has been made to thenotification of the call incoming. On reception of the notification ofthe reply to the response from the call/incoming response detectioncircuit 104, the collation circuit 110 causes the portable telephone setmanagement information of the portable telephone set 54 to be stored ina mover management table 99.

[0163] The mover management table 99 is comprised of a storage deviceand stores the portable telephone set discriminating information of thetotality of the portable telephone sets placed under control by theportable telephone output limiting management device 52 and hencelimited in the outputting of the radio wave and which have maderesponses to the incoming of the calls.

[0164] On reception of the response to the incoming from the portabletelephone set 54, the portable telephone output limiting managementdevice 52 performs the following operations until the time the portabletelephone set 54 has moved to the site of the deck 58 of FIG. 6 and theportable telephone set 54 starts the talk.

[0165] A mover management circuit 96 checks the contents of the movermanagement table 99 at all times and, if the portable telephone setmanagement information is newly written on a portable telephone set(referred to as the portable telephone set 54 as before), the currenttime is acquired from clock 97, and the time is stored in the movermanagement table 99 in association with the newly written portabletelephone set management information. This time information is utilizedas the time stamp of the time which has newly been placed under controlby the mover management circuit 96.

[0166] If the portable telephone set 54 is newly registered in the movermanagement table, the mover management circuit 96 issues a command tosend to a moving message assembling circuit 98 a message running “theportable telephone set is moving to a site where the portable telephoneset can be used. Please wait for a while” to take the place of theportable telephone set 54.

[0167] On reception of the command from the mover management circuit 96,the moving message assembling circuit 98 synthesizes the digital data ofa send-out image as the speech in the form of the guide informationrunning: “This portable telephone set is moving to site which permitsthe use of the portable telephone set. Please wait for a while” andsends the synthesized digital data to the reply message issuing circuit108.

[0168] On reception of the digital data of the reply message, the replymessage issuing circuit 108 responds to the incoming of the call signalfrom the base station 55 of FIG. 6 to issue repeatedly a message running“The portable telephone set is moving to a site which permits the use ofthe portable telephone set. Please wait for a while”.

[0169] The mover management circuit 96 waits until the portabletelephone set 54 moves to the deck 58.

[0170] When moved to the deck 58, the user of the portable telephone set54 again thrusts a button of the incoming response (second response tothe call incoming). This second response to the incoming call isreceived using a room antenna 57 of FIG. 6 from the portable telephoneset 54.

[0171] It is the antenna in the carriage 71 that corresponds to theantenna in the carriage 57 of FIG. 6. The antenna in the carriage 71receives a radio wave from the portable telephone set 54 to convert itinto electrical signal which are sent to the duplexer 89. The duplexerseparates the electrical signal sent from the antenna in the carriage 71to send the separated electrical signal to the receiver circuit 90. Thereceiver circuit 90 demodulates the electrical signal sent from theduplexer 89 to send the received digital data to the channel codec 92.The channel codec 92 synchronizes the received digital data sent fromthe receiver circuit 90 to extract the information portion containingthe meaningful information to send the extracted digital data of theinformation portion to a second incoming call response detection circuit94.

[0172] The second incoming call response detection circuit 94 at alltimes detects the information of the second response to the incomingcall transmitted in the deck 58, from among the received digital datasent from the channel codec 92, to notify the results of detection andthe detected information on the management of the portable telephonesets to the mover management circuit 96.

[0173] The mover management circuit 96 on reception of the fact ofdetection of the second response to the incoming call and the portabletelephone management information collates the received contents with thecontents stored in the mover management table 99. In case of coincidenceof the portable telephone management information, the mover managementcircuit 96 deems that the portable telephone set 54 has moved to thedeck 58.

[0174] The mover management circuit 96 notifies a command of causinghandover from the portable telephone set 54 to a radio communicationchannel of the room antenna 61 connected to the repeater for theportable telephone set 59 and the portable telephone managementinformation to a hand-over command circuit 95.

[0175] The mover management circuit 96 issues a command to a movingmessage assembling circuit 98 to halt the transmission of the “moving”message.

[0176] The mover management circuit 96 deletes the portable telephoneset management information stored in the mover management table 99.

[0177] On the other hand, a matching circuit 115 among repeater deviceshas periodic communication with the repeater 59 to pick up at all timesa vacant channel on the room antenna side of the repeater set 59.

[0178] On reception from a handover command circuit 94 of the handoverrequest and the portable telephone set management information of themoved set in question (portable telephone set), the matching circuit 115requests the repeater 59 of FIG. 6 to establish a radio communicationchannel between the base station 55 and the repeater for the portabletelephone set 59 of FIG. 6.

[0179] On completion of establishing the radio communication channel,the repeater 59 communicates the fact of channel establishment to thematching circuit 115. The matching circuit 115 recognizes that thepreparation for handover of the portable telephone set has now beencompleted and communicates that effect to the hand-over command circuit95.

[0180] On reception of the notification on the completion of handoverpreparation from the matching circuit 115, the hand-over command circuit95 issues to the portable telephone set 54 the command information forhandover to a vacant channel on the room antenna 61 of the repeater 59.

[0181] The portable telephone set 54 has communication with the repeater59 via the room antenna 61. The repeater 59 first receives a radio wavewith low power transmitted from the portable telephone set 54, thenconverts the wireless path to amplify the signals to establishconnection with the base station 55 using the antenna outside thecarriage 60.

[0182] The portable telephone set 54 has now established a radiocommunication channel with the base station 55 via the repeater 59 toenable a voice communication.

[0183] It is probable that, when the mover management circuit 96 iswaiting for movement of the portable telephone set 54 to the deck 58,the portable telephone set 54 does not move to the deck 58 for prolongedtime. In order to cope with this situation, the mover management circuit96 checks the time stamp stored in the mover management table 99 and, ifnot less than three minutes, for example, have elapsed since receptionof the first power limitation call incoming response, the movermanagement circuit 96 gives up control of the portable telephone set 54to delete the information on the portable telephone set 54 from themover management table to send out a message running “I cannot reply tothe call now” from the moving message assembling circuit 98 todisconnect the radio network between the base station 55 and theportable telephone output limiting management device 52.

[0184]FIG. 8 is a block diagram showing the structure of the portabletelephone set adapted to cope with the portable telephone set outputlimiting management device and which has the functions of discriminatingthat an output limiting signal from the portable telephone outputlimiting management device is being received, automatically returningthe portable telephone set discriminating information of the portabletelephone set, detecting the incoming control signal during the outputlimiting mode and returning the information that the incoming call hasbeen made during the output limiting time.

[0185] Referring to FIG. 8, an antenna 120, a duplexer 121, a receivercircuit 122, a transmission circuit 123, a channel codec 124, a speechcodec 125, a D/A converter 126, an amplifier 128, a receiver 130, an A/Dconverter 127, an amplifier 129 and a microphone 131 are basicconstituent elements of a conventional portable telephone set.

[0186] The structure characteristic of the second embodiment of thepresent invention is explained in the below. An antenna in the carriage53 in FIG. 6 transmits a signal for limiting the outputting of a radiowave. The received signal is converted into electrical signals which aresent to the duplexer 121. The duplexer 121 separates the electricalsignals sent from the antenna 120 to send the separated electricalsignals to the receiver circuit 122. The receiver circuit 122demodulates the electrical signals sent from the duplexer 121 to sendthe received digital data to the channel codec 124. The channel codec124 synchronizes the received digital data from the receiver circuit 122to extract an information portion to send the digital data of theinformation portion to the speech codec 125 and to an output limitingsignal detection circuit 133.

[0187] The output limiting signal detection circuit 133 receives digitaldata from the channel codec 124 to check whether or not a command of anoutput limitation is contained in the received digital data.

[0188] On detection of the output limiting command information, theoutput limiting signal detection circuit 133 sends a command forlimiting the transmitted power to an output power limiting circuit 132.For advising the owner (user) of the portable telephone set of the factthat the portable telephone set is in the output limiting state, theoutput limiting signal detection circuit 133 sends a command for ringinga single tone to instruct the automatic personal information respondingcircuit 134 to instruct transmission of the personal informationcontaining the proper information of the portable telephone set and theinformation concerning the telephone number and the information of thecall incoming permitting flag.

[0189] On reception of the transmission of the personal information, theautomatic personal information responding circuit 134 sends the digitaldata on the personal information to the channel codec 124.

[0190] If data of the voice message is previously stored in the ownportable telephone set, the automatic personal information respondingcircuit 134 instructs the voice message storage circuit 135 aftersending out the digital data of the personal information. The voicemessage storage circuit 135 receives a command for sending out thedigital data of the voice message from the automatic personalinformation responding circuit 134 to send out the digital data of thevoice message stored in the channel codec 124.

[0191] The voice message storage circuit 135 is able to store thedigital data of the voice message signal.

[0192] The voice signal of the digital data voice message is entered toa microphone 131 which then converts the voice signal into electricalsignal which is sent to the A/D converter 127. The A/D converter 127samples analog signal, amplified by an amplifier 129, at a sampling rateof, for example, 8 kHz, for conversion into digital signal, which issent to the speech codec 124. The speech codec 124 encodes the speechusing, for example, the vector ring excitation linear predictive codingsystem.

[0193] The speech codec 124 sends the encoded voice message signal tofeed the voice message storage circuit 135, which then stores thedigital signals from the speech codec 124.

[0194] The time during which to store voice data depends on the memorycapacity in the voice message storage circuit 135. In the presentembodiment, voice data continuing for 3 to 5 seconds, for example, isstored.

[0195] The portable telephone set of FIG. 2 of the second embodiment ofthe present invention is characterized in that it has the function ofdetecting and responding to the call incoming information from theportable telephone output limiting management device when the portabletelephone set is in the output limiting mode. This function is explainedin connection with respective blocks.

[0196] When the portable telephone set is in the output limiting mode,the portable telephone set of FIG. 8 awaits the incoming of theinformation indicating the incoming of a call during output limitationvia antenna 120.

[0197] A radio wave transmitted from the antenna in the carriage 53 isreceived by the antenna 120 and converted into electrical signal whichis sent to the duplexer 121. The duplexer separates the electricalsignal sent from the antenna 120 to send the separated electrical signalto the receiver circuit 122.

[0198] The receiver circuit 122 demodulates the electrical signal sentfrom the duplexer 121 to send received digital data to the channel codec124. The channel codec 124 synchronizes the digital data sent from thereceiver circuit 122 to extract an information portion to send thereceived digital data to the output limiting signal detection circuit133, speech codec 125 and to a detection circuit 138 adapted fordetecting the call incoming during output limiting time.

[0199] The detection circuit 138 receives the digital data from thechannel codec 124 to check whether or not the information indicating theincoming of a call during output limiting time is contained in thereceived digital data. On detection of the information indicating theincoming of a call during output limiting time, the detection circuit138 activates a circuit for detecting the pressing of a response key tooutput limitation 140 to set the vibrator 137 into vibrations in orderto apprise the user of the portable telephone set of the fact ofincoming of a call.

[0200] If the user recognizes that the user is receiving a call and iswilling to respond to the call, he or she presses down an response key141. If the circuit for detecting the pressing of a response key tooutput limitation circuit 140 detects that the response key 141 ispressed down and issues a command to cause an output limiting time callincoming response issuing circuit 139 to return the output limiting timeincoming call response to the output limiting time call incomingresponse issuing circuit 139.

[0201] The output limiting time call incoming response issuing circuit139 sends digital data of the output limiting time call incomingresponse information to the channel codec 124. The channel codec 124converts the control signal from the output limiting time call incomingresponse issuing circuit 139 into an information form at which permitsreception by the portable telephone output limiting management device 52of FIG. 6 to send the resulting transmission digital signals to atransmission circuit 123. The transmission circuit 123 modulates andamplifies the transmission digital signals from the channel codec 124 tosend the resulting signals to the duplexer 121. The duplexer 121transmits the output signals from the transmission circuit 123 to theantenna 120 which then transmits the radio wave carrying the outputlimiting time response signal to the portable telephone output limitingmanagement device 52.

[0202] The operation of the second embodiment of the present inventionis now explained.

[0203] Referring to FIG. 6, an output limiting signal is perpetuallyoutputted from the antenna in the carriage 53 in the electric rollingstock 56 and the antenna in the carriage 57 in the deck 58. The outputlimiting signal is outputted at a low output of, for example, 10 mW,that can be received only in the carriage. The window portion of theelectric rolling stock is preferably shielded to avoid the outputlimiting signal from leaking out of the carriage. On entrance into theinside of the electric rolling stock 56 or the deck 58, the portabletelephone set 54 receives the output limiting command informationtransmitted from the antenna in the carriage 53 or the antenna in thecarriage 57 to enter into the output limiting mode. When entering intothe output limiting mode, the portable telephone set 54 halts the directexchange through a wireless communication with the base station 55. Forshowing to the portable telephone output limiting management device 52that it has entered into the output limiting mode, the portabletelephone set 54 transmits to the antenna in the carriage 53 or to theantenna in the carriage 57 to enter into the output limiting mode. Fornotifying to the portable telephone output limiting management device 52that the portable telephone set 54 has entered into the output limitingmode, the portable telephone set 54 transmits, with a radio wave of lowintensity, such as 8 mW, to the antenna in the carriage 53 or to theantenna in the carriage 57, the fact of entrance to the output haltingmode, and the notification portable telephone set identificationinformation made up of the portable telephone set management number,telephone number, reply message, communication information flag and theincoming permission flag.

[0204] The portable telephone output limiting management device 52receives the information sent from the portable telephone set 54,through the antenna in the carriage 53 or the antenna in the carriage57, to update the contents of the limited portable telephone informationsupervising table 103.

[0205] The portable telephone output limiting management device 52 actson the assumption that the portable telephone sets registered in thelimited portable telephone information supervising table 103 are underits management and responds in place of the portable telephone sets tothe call from the base station 55 until the portable telephone sets inquestion exit the electric rolling stock.

[0206] If the portable telephone set 54 is the portable telephone setadapted to cope with the output limiting time incoming function, and theincoming permission flag is previously set to ON, the portable telephoneset 54 is responsive to the call from the base station 55 to prompt theuser to move to, for example, the deck 58 where the portable telephoneset can be used. On reception from the output-limited portable telephoneset 54 of the incoming response transmitted with a radio wave of lowintensity, the portable telephone set 52 transmits to the base station55 a message on the fact of moving during the time it is moving from theuse-limited site to the use-permitted site, such as the deck 58.

[0207] When moved to the deck 58, the user of the portable telephone set54 again presses a reply response button by way of a second response tothe incoming call. This second response to the incoming call istransmitted from the portable telephone set 54. On reception of thesecond incoming response, the portable telephone output limitingmanagement device 52 verifies that the portable telephone set has movedto the use-permitted site to issue a handover command to the repeater59. The portable telephone set 54 initiates a communication with thebase station 55 via the repeater 59.

[0208]FIG. 9 shows an example of the management information of thelimited portable telephone information management table 103 in aportable telephone output limiting management device 62 according to asecond embodiment of the present invention.

[0209] In the limited portable telephone information management table103, there is stored the information on the portable telephone set undercurrent management on which output limitation is placed by the portabletelephone output limiting management device 52.

[0210] Referring to FIG. 9, there is added to the limited portabletelephone information management table 103 the site of storage of theincoming permitting flag in addition to the contents shown in FIG. 4. InFIG. 9, the incoming permitting flag, indicated by a circle mark,indicates the on-state (incoming permission).

[0211] The added incoming permission flags are explained. The incomingpermitting flag is used for verifying whether or not, if call addressedto a portable telephone set 54 is requested from the base station 55 tothe portable telephone output limiting management device 52, theinformation indicating the fact of incoming is to be communicated to theportable telephone set 54. For the portable telephone set, for which theincoming permission flag is set to off, the portable telephone outputlimiting management device 52 operates in the same fashion to theabove-described first embodiment.

[0212] The portable telephone output limiting management device 52communicates the fact of incoming to the portable telephone set 54 forwhich the incoming permitting flag is set to on. The portable telephoneoutput limiting management device 52 performs control until movement tothe deck 58 and until start of talk by the portable telephone set afterits movement to the deck 58.

[0213] Although the second embodiment has been explained with referenceto an electric rolling stock having a carriage in the inside of whichuse is limited and in a deck of which the use is permitted, the presentinvention is, of course, not limited to this electric rolling stock.

[0214] In FIG. 6, the antenna in the carriage 57 on the deck 58 and theantenna in the carriage 61 in the repeater for the portable telephoneset may be unified, in which case the second response to the incomingcall from the portable telephone set 54 is received by the antenna 61and communicated from the repeater device 59 to the portable telephoneoutput limiting management device 52.

[0215] The repeater device 59 and the portable telephone output limitingmanagement device 52 may be interconnected by a cable rather than via aradio channel depending on usage.

[0216] A third embodiment of the present invention is explained. As thethird embodiment, the structure and the operation of the repeater forthe portable telephone set 59 is explained. The relay network is assumedto be a sole network.

[0217]FIG. 10 shows an example of the structure of the repeater deviceshown in FIG. 6. The structure of the portable telephone output limitingmanagement device shown in FIG. 7 is to be referred to in the following.

[0218] The relation of correspondence between the elements shown in FIG.10 and those shown in FIG. 6 is explained. The antennas outside thecarriage 60, 61 of FIG. 6 correspond to the antenna outside the carriage142 and to the antenna in the carriage 161 of FIG. 10, respectively.

[0219] In the repeater for the portable telephone set, shown in FIG. 10,a circuit block 163 comprised of an antenna in the carriage 161, aduplexer 160, a receiver circuit 158, a transmission circuit 159, achannel codec 157 and path changeover switches 155, 156 communicate withthe portable telephone output limiting management device 52 in thecarriage of the electric rolling stock 56 or with the portable telephoneset 54 in FIG. 6. The antenna in the carriage 161 is similar to theantenna in the carriage 61 in FIG. 6, as mentioned above.

[0220] A circuit block 162, made up of the antenna outside the carriage142, a duplexer 143, a receiver circuit 144, a power amplifier 146, atransmission circuit 147 and a channel codec 145 communicates with thebase station 55 shown in FIG. 6. The antenna outside the carriage 142 issimilar to the antenna outside the carriage 60 in FIG. 6, as mentionedabove.

[0221] The repeater for the portable telephone set has the function ofrelaying a radio wave of the portable telephone set in the electricrolling stock to a base station outside the electric rolling stock. To aradio channel for communication between the repeater and the portabletelephone output limiting management device, referred to below as a“device control channel”, a radio channel for communication between therepeater and the portable telephone set in the electric rolling stock,referred to below as an “inside communication channel”, and a radiochannel for communication between the repeater and the base stationoutside the electric rolling stock, referred to below as an “outsidecommunication channel”, different frequencies are assigned to avoidinterference.

[0222] For communication with the base station outside the electricrolling stock, the repeater uses a radio wave of a high transmissionpower, such as 5 W, obtained on amplification with a power amplifier146. For communication with the portable telephone set in the electricrolling stock or with the portable telephone output limiting managementdevice, the repeater uses a radio wave of low transmission power, suchas 10 mW.

[0223] A vacant channel management circuit 153 supervises the vacantstate of the radio channel, that is the inside communication channel,adapted for communicating with the portable telephone set in theelectric rolling stock.

[0224] Within the vacant channel management circuit 153, there isprovided a management table having a flag for managing the channelfrequencies and use/non-use of the radio channels.

[0225] A vacant channel communication circuit 154 collects theinformation of the vacant channel from the vacant channel managementcircuit 153 to transmit the vacant channel information to the matchingcircuit 115 of the portable telephone output limiting management device,via channel codec 157, path changeover switch 156 and transmissioncircuit 159, using the device control channel.

[0226] On reception of a command for acquisition of the outside talkchannel from the matching circuit 115 in the portable telephone outputlimiting management device, with the aid of the device control channel,a channel connection circuit 150 requests the base station 55 in FIG. 6to establish the outside communication channel via the channel codec145, the power amplifier 146 and the antenna outside the carriage 142.

[0227] Responsive to the request for establishment of the outsidecommunication channel, the base station first allotts a non-used newradio channel and, after handover of the portable telephone set in theelectric rolling stock, re-connects the suspended network to a newlyacquired network with a reply message.

[0228] On reception from the base station 55 via the antenna outside thecarriage 142, receiver circuit 144, bus changeover switch 149 and thechannel codec 145, the network establishment circuit 150 communicates tothe matching circuit 115 the fact that the outside talk channel has beenestablished, using a device control channel.

[0229] The matching circuit 115 in the portable telephone outputlimiting management device verifies that the movable unit ( portabletelephone set) in question is readied for handover and advises ahandover command circuit 95 that preparation for handover has now beenmade.

[0230] On reception of a notice on the completion of preparation forhandover from the matching circuit 115, the hand-over command circuit 95sends to the portable telephone set 54 a command information to executea handover process to the vacant channel in the room antenna 161 in therepeater 71.

[0231] The channel connection establishment circuit 150 monitors thehandover command outputted by the hand-over command circuit 95 of theportable telephone output limiting management device.

[0232] The channel connection establishment circuit 150 monitors thechannel frequency of the inside communication channel of the handoverdestination to transmit the channel number designated as the handoverdestination to the vacant channel management circuit 153.

[0233] On reception of the information of the handover designatingchannel from the channel connection establishment circuit 150, thevacant channel management circuit 153 changes the flag of the specifiedchannel in the management table from “out of use” to “in use”.

[0234] On reception of the handover command for the portable telephoneset from the portable telephone output limiting management device, thechannel connection establishment circuit 150 communicates to the basestation that the portable telephone set in the carriage is ready forhandover and issues a path switching command to a network switchingcircuit 152.

[0235] The network switching circuit 152 has the function of switchingsignal pathes in the repeater through which flows the data.

[0236] The mode in which the repeater for the portable telephone set isrelaying the communication network of the portable telephone set istermed a “path setting mode B”. FIG. 12 shows the corresponding settingof the path changeover switch.

[0237] The mode in which the repeater for the portable telephone set isnot relaying the communication network is termed a “path setting modeB”. FIG. 11 shows the corresponding setting of the path changeoverswitch.

[0238] In the mode A of FIG. 11, communication with the base station iseffected by the network connection establishment circuit 150 via thechannel codec 145. The communication with the portable telephone outputlimiting management device is taken charge of by the channel connectionestablishment circuit 150 via the channel codec 157.

[0239] In the mode B of FIG. 12, an information sent from the basestation via the outside communication channel is sent to directly to theportable telephone set in the carriage via the transmission circuit 159and the room antenna 161 through the inside communication channelwithout routing through the channel codec. In addition, a informationsent from the portable telephone set in the electric rolling stockthrough the inside communication channel is directly sent by the outsidecommunication channel to the base station via the transmission circuit147, power amplifier 146 and the room antenna 142 to the base stationinstead of through the channel codec.

[0240]FIG. 13 shows the stationary state of a repeater for the portabletelephone set according to a third embodiment of the present inventionand the flow of the operation from channel connection establishment tothe channel relaying operation.

[0241] In the steady state, the repeater 59 communicates the informationon the vacant channel of the inside communication channel to thematching circuit 115 of the portable telephone output limitingmanagement device 52 at a pre-set interval of, for example, 5 seconds.In the steady state, the internal bus of the repeater 59 is in the modeA.

[0242] The operation from a channel connection establishment to achannel relaying is explained below.

[0243] The portable telephone output limiting management device 52issues a channel connection establishment request to the repeater 59. Onreception of the network establishment request, the repeater 59 issuesthe channel connection establishment request to the base station 55. Onreception of the channel connection establishment request, the basestation 55 acquires a new radio channel to notify a successful channelacquirement of a vacant channel to the repeater 59.

[0244] On reception of the successful acquirement of a vacant channel,the repeater device 59 notifies the successful acquirement of a vacantchannel to the portable telephone output limiting management device 52.

[0245] On notification of the successful acquirement of a vacantchannel, the repeater device 59 monitors an arrival of a handovercommand which the portable telephone output limiting management device52 issues to the portable telephone set 54.

[0246] In case of arrival of the handover command, the repeater 59awaits a notification of a handover completion from the portabletelephone set 54 in the carriage.

[0247] On reception of the handover completion from the portabletelephone set 54 in the carriage, the repeater device 59 notifies theeffect of handover completion to the base station 55 to switch theinternal signal path to the mode B to enter into the channel relayingmode.

[0248] Thus, it is possible to have communicates in the carriage by theportable telephone output limiting management device under an outputlimited condition. The radio communication to outside the carriage canbe had by the repeater device by exploiting the dedicated antennaoutside the carriage. Moreover, since the transmitted power is amplifiedby the repeater device, the communication with the base station can behad under more meritorious conditions than when having directcommunication from inside the carriage to the base station.

[0249] In the above-described third embodiment, the electric rollingstock having the repeater device in the use-limited carriage and in theuse-permitted deck has been explained above. However, the presentinvention is not limited to the above electric rolling stock. Also, arepeater device may be further equipped with a handover command circuitexplained in connection with the portable telephone output limitingdevice and a plurality of the repeater devices may be interconnected byradio channels or cables.

[0250] It is to be noted that the present invention may similarly beapplied to a personal handyphone system, (PHS) or may also be a varietyof mobile information terminals that can have communication with thebase station as a mobile station. The setting or releasing of the outputlimitation of the portable telephone set can, of course, be effected byon/off of a predetermined switch accommodated on the portable telephoneset.

[0251] [Effect of the Invention]

[0252] According to the present invention, as described above, if radiowave outputting is limited by a portable telephone output limitingmanagement device, and a incoming is made to a portable telephone set,the portable telephone output limiting management device automaticallytakes the place of the portable telephone set to reply to the effectthat the set is not in a position to talk by telephone, so that theoriginating party who has called the portable telephone set can clearlycomprehend the reason the called party cannot talk by telephone.

[0253] According to the present invention, if an owner of a portabletelephone set who has turned the site of the notification informationflag on is belayed for the appointed time and is moving on an electricrolling stock, the counter-party is automatically informed ofwhereabouts of the owner of the portable telephone set on calling bytelephone. Thus, the counter-party can roughly estimate the time ofarrival of the party belayed for the appointed time to enhance theutility of the portable telephone set.

[0254] The meritorious effect and advantages of the present inventionare further explained in detail. According to the present invention,since the outputting of the portable telephone set is automaticallylimited by the output limiting information issued from the portabletelephone output limiting management device, it is unnecessary for theowner of the portable telephone set to perform power on/off operationsof the portable telephone set when getting on board and alighting fromthe electric rolling stock. Moreover, the owner of the portabletelephone set is apprised of the entrance to output limitation by theringing of the sounder attached to the portable telephone set.

[0255] Moreover, if the owner of the portable telephone set is delayedfor e.g., appointment, he or she is obliged to a light from the electricrolling stock to observe the manner because the use of the portabletelephone set in the electric rolling stock is prohibited as a matter ofmanner despite his or her intention to communicate with thecounter-party of appointment by telephone, thus increasing the delay.According to the present invention, since the portable telephone outputlimiting management device apprises the counter-party of the whereaboutsof the user on the occasion of a call-out from the counter-party so thatthe latter is indirectly apprised of the status of the-owner.

[0256] According to the present invention, it is possible to clearlydemarcate the case in which the owner is on board an electric rollingstock and hence cannot reply to the call from the case in which amessage running: “the portable telephone set is outside the reach ofradio wave or the power is off so that it cannot reply to a call”.

[0257] Also, according to the present invention, providing the portabletelephone set having the function of accepting an incoming call underoutput-limited condition and the portable telephone output limitingmanagement device having the function of advising the fact of theincoming call under an output-limited condition, it is possible toaccept an incoming call under a condition of transmission power of aradio wave limited in an electric rolling stock where use of theportable telephone set is partially permitted, such as shinkansen linetrain or on a limited express train, such that, if the user moves to ause-permitted site in the train, he or she can have talks underoutput-limited conditions.

[0258] In addition, according to the present invention, since there isprovided the function of automatically advising the fact of movement ofthe portable telephone set user to the base station during the time theuser moves from the use-inhibited site to the use-permitted site, theoriginating site is apprised of the reason the owner is belayed, whilethe owner may feel safe as he or she moves.

[0259] The present invention also has the meritorious effect that theuser can have communications in the electric rolling stock under anoutput-limited condition. With the aid of the repeater device, radiocommunication with the outside can be had via the dedicated antennaoutside the electric rolling stock and the transmission power isamplified by the repeater device. Thus, communication with a basestation can be had under a more meritorious condition than if the userdirectly communicates with the base station from the inside of thecarriage of the electric rolling stock.

[0260] It should be noted that other objects of the present inventionwill become apparent in the entire disclosure and that modifications maybe done without departing the gist and scope of the present invention asdisclosed herein and appended herewith.

[0261] Also it should be noted that any combination of the disclosedand/or claimed elements, matters and/or items may fall under themodifications aforementioned.

What is claimed is:
 1. A mobile communication system, comprising: a basestation; a mobile station terminal; and controlling means for limitingoutput of the mobile station terminal, said controlling meanscomprising: means for sending a reply message to said base station onreception of a call signal addressed to said mobile station terminalsent from said base station, in place of said mobile station terminal, awireless communication of said mobile station terminal with said basestation being limited.
 2. The mobile communication system, as defined inclaim 1, said controlling means further comprising: means for sendingout an output limitation command signal to the mobile station terminallocated in a site where use of the mobile station terminal is limited,means for receiving information containing said reply message sent backfrom said mobile station terminal which receives said output limitationcommand signal to enter into an output-limiting mode; and means forregistering and managing the mobile station terminal as anoutput-limited terminal.
 3. A mobile communication system, comprising: abase station; a mobile station terminal; and controlling means forlimiting output of the mobile station terminal, said controlling meanscomprising: means for causing a call incoming to arrive with a lowpowered radio wave at the mobile station terminal in a output-limitedmode on reception of said call incoming addressed to said mobile stationterminal, said means transmitting a reply message in response to saidincoming to the mobile station terminal in place of the mobile stationterminal to the base station.
 4. A portable telephone set outputlimitation management device comprising: means for sending out an outputlimitation command signal to a portable telephone set located in a sitewhere use of a portable telephone set is limited through a first antennaaccommodated in the site where use of a portable telephone set islimited; and means for receiving information proper to the portabletelephone set transmitted from the portable telephone set which hasreceived the output limitation command signal and which has entered intoan output limiting state via said first antenna to register andsupervise the portable telephone set in the output limiting state alongwith the information proper to the portable telephone set.
 5. Theportable telephone set output limitation management device as defined inclaim 4 further comprising: a second antenna for having wirelesscommunication with the base station; and means for retrieving a replymessage information, from information registered as the informationproper to the portable telephone set in case of an incoming of a call tothe portable telephone set in the output limited state to transmit saidreply message automatically to an originating side in place of theportable telephone set, said information proper to the portabletelephone set transmitted from said portable telephone set which hasentered into the output limiting state containing the reply messageinformation.
 6. The portable telephone set output limiting managementdevice as defined in claim 4 or 5 wherein said information proper to theportable telephone set contains an identification information of theportable telephone set, number of the portable telephone set, replymessage information and a notification information flag for specifyingwith which response pattern the portable telephone output limitingmanagement device responds to a call from the base station; there beingprovided means for registering and supervising the information in atable using the management number of the portable telephone set as akey; the reply message is automatically transmitted to said basestation, based on a state of the notification information flag and thereply message information registered in the table, in place of theportable telephone set, responsive to the call from the base station tothe portable telephone set being set in the output limiting mode.
 7. Theportable telephone set output limiting management device as defined inclaim 4 or 5 wherein said notification information flag contains aplurality of information flags for selecting possible presence ofnotification of a portable telephone set number pre-set in the portabletelephone set, possible presence of a voice message, possible presenceof notification of a current site, and possible presence of suppressionof an automatic reply function by the portable telephone output limitingmanagement device.
 8. A portable telephone set comprising: means forperforming control for limiting a wireless communication with a basestation in an output-limited mode on reception of a predetermined outputlimiting command information transmitted through an control deviceprovided in a site where use of the portable telephone set is limited;means for transmitting information proper to the portable telephone tothe control device in a low power transmission mode.
 9. A portabletelephone set comprising: means for performing control for limiting awireless communication with a base station in an output limited state onreception of an output limiting command information transmitted throughan antenna provided in a site where use of a portable telephone set islimited; means for transmitting information proper to the to portabletelephone to an portable telephone output limiting management device,said portable telephone output limiting management device comprisingmeans for receiving said information; and means for retrieving a replymessage information from said information, responsive to an incoming tothe portable telephone set in the output limited state to transmit saidreply message automatically to an originating side in place of theportable telephone set.
 10. The portable telephone set as defined inclaim 8 or 9 wherein the information proper to the portable telephoneset contains identification information of said portable telephone set,portable telephone number, response message information and acommunication information flag for specifying response pattern withwhich said portable telephone output limiting management device is toreply to a call from a base station.
 11. The portable telephone set asdefined in claim 8 or 9 further comprising: Means for informing an ownerof the portable telephone set of an entrance into the output limitingmode on detecting the reception of the output limiting commandinformation by sounder vibration.
 12. The portable telephone set asdefined in claim 9 further comprising: means for sending out atransmission power limiting command to an transmission power limitingcircuit on detection of reception of said output limiting commandinformation; means for commanding transmission of identificationinformation of the portable telephone set, telephone number and forperforming control for commanding sending of a voice message if data ofsaid voice message data is recorded in said voice message storage means;wherein, on entrance to the output limiting mode, fact of such entranceto the output limiting mode, the identification information of theportable telephone set, the telephone number, response voice messageinformation and the notification portable telephone set identificationinformation consisting of a notification information flag for specifyingwith which response pattern the portable telephone output limitingmanagement device is to reply to the call-out from the base station, aretransmitted to the first transmission/reception antenna for notificationto the portable telephone output limiting management device.
 13. Aportable telephone set output limiting system comprising: a portabletelephone output limiting management device for transmitting a radiowave signal of an output limiting command information from a firstantenna provided on a site where use of a portable telephone set islimited; wherein when the portable telephone set enters said site toreceive the output limitation command information from said firstantenna, the output limiting mode is initiated to halt direct exchangewith a base station to transmit to said first antenna of said portabletelephone output limiting management device a fact of entrance to anoutput cessation mode of the portable telephone set, and informationproper to the portable telephone set including the portable telephoneset management number, telephone number, a reply message and anotification information flag, if need be, with an a low powered radiowave; and wherein the portable telephone output limiting managementdevice receives the information proper to the portable telephone setsent out from the portable telephone set through said first antenna toupdate and register the information including the notificationinformation flag in a management table; said portable telephone outputlimiting management device regarding that the portable telephone setsregistered in said management table as the portable telephone setsplaced under its control so that subsequently the portable telephoneoutput limiting management device responds to a call from a base stationin place of the portable telephone set in the output limited state untilthe portable telephone set in the output cessation mode exits said site.14. The portable telephone set output limiting system as defined inclaim 13 wherein, said portable telephone output limiting managementdevice further comprising: means for collating on detecting the callsignal from the base station whether the call is that for the portabletelephone set managed and controlled by said portable telephone outputlimiting management device, by retrieving in the management table andfor commanding reply message assembling means, if as a result of thecollation, the portable telephone set of the call destination is undercontrol of said portable telephone output limiting management device, tosend information on a management number of the portable telephone setand an output of the reply message; said reply message assembling meanscaptures information on the reply message from message send-out means,using the management number of the portable telephone set as aretrieving key, to insert information data on the current site if needbe to synthesize voice data; and wherein the synthesized voice data istransmitted from said message send-out means via a transmission circuitand a second antenna to said base station to make a response in place ofthe output-limited portable telephone set.
 15. A portable telephoneoutput limiting management device comprising: means for causing a callincoming to arrive at an output-limited portable telephone set onreception of said call incoming addressed to said output-limitedportable telephone set, said means automatically transmitting a replymessage to a base station.
 16. A portable telephone output limitingmanagement device comprising: means for causing a call incoming toarrive at a output-limited portable telephone set under outputlimitation in reception to said call incoming addressed to saidoutput-limited portable telephone set; and means for causing hand-overto a repeater device provided at a site where use of said portabletelephone set is permitted, on detecting that the portable telephone sethas been moved to the site where use of said portable telephone set ispermitted.
 17. A portable telephone output limiting management devicecomprising: means for sending out an output limitation command signalfor limiting outputting of a radio wave via a first antenna provided ata site where use of a portable telephone set is limited to a portabletelephone set located in a site where use of a portable telephone set islimited; means for receiving information proper to the portabletelephone set, transmitted from the portable telephone set which hasreceived the output limiting command signal to halt the communicationwith a base station so as to be in the output-limited state, via saidfirst antenna, to register and supervise the portable telephone set inthe output-limited state along with the information proper to theportable telephone set including call incoming permitting information; asecond antenna for having radio communication with said base station;and means for having reference to the incoming permitting informationfor information proper to the portable telephone set when there is theincoming call to the portable telephone set in the output-limited statefrom said base station, said means advising said portable telephone setof the fact of the incoming call in case the incoming of the call ispermitted.
 18. The portable telephone output limiting management deviceas defined in claim 17 comprising: means for communicating to anoriginating side a message stating the incoming of a call bytransmitting said message to the base station on communicating theincoming of the call to said base station.
 19. The portable telephoneoutput limiting management device as defined in claim 17 or 18comprising: means for registering the information proper to the portabletelephone set on a management table, using a management number of theportable telephone set as a key, for management, said informationincluding the portable telephone set identification information,portable telephone set number, reply message information, a notificationinformation flag for specifying with which pattern the portabletelephone output limiting management device is to reply to a call fromthe base station and an incoming permission flag; wherein if saidincoming permission flag registered in said table is on, a call from thebase station to a portable telephone set in the output limiting mode iscaused to arrive at said portable telephone set and a reply message isautomatically transmitted to said base station, based on a state of saidnotification information flag and the reply message information.
 20. Theportable telephone output limiting management device as defined in anyone of claims 13 to 15 further comprising: means for transmitting areply message stating that the portable telephone set is moving to saidbase station, on receiving from the portable telephone set inoutput-limited mode a response to a call incoming transmitted with aradio wave transmitted with limited transmission power, until a user ofthe portable telephone set moves from a use-limited site for theportable telephone set to a use-permitted site for the portabletelephone set.
 21. The portable telephone output limiting managementdevice as defined in any one of claims 17 to 19 further comprising:control means for commanding hand-over to a radio channel of an antennaconnected to a repeater device for a communication between theoutput-limited portable telephone set and a base station if a pre-setresponse from the portable telephone set via a third antenna provided ina use-permitted site for the portable telephone set, termed to as asecond response to the incoming call, based on a detection of a factthat the user of the portable telephone set has moved to theuse-permitted site; and means for requesting the repeater device toestablish a radio channel between the base station and the repeaterdevice responsive to said hand-over command.
 22. The portable telephoneoutput limiting management device as defined in any one of claims 17 to21 further comprising: control-means for performing time managementprocessing to await reception of a response signal indicating that theuser of the portable telephone set has moved to the use-permitted siteafter reception of an incoming response from the portable telephone setto the notification as to the incoming call to said portable telephoneset, said control means initiating a disconnection of a channelconnection to said base station if no response signal is obtained fromsaid portable telephone set after awaiting for the pre-set time.
 23. Aportable telephone set comprising: means for detecting a reception ofthe output limitation signal from the portable telephone output limitingmanagement device as defined in any one of claims 15 to 22; means forsending back information proper to the portable telephone set; and meansfor detecting an incoming signal during an output limiting mode to sendback an output-limiting-time-incoming information.
 24. A portabletelephone set comprising: means for detecting reception of the outputcontrolling command information via said first antenna from the portabletelephone output limiting management device as defined in any one ofclaims 15 to 22; means for limiting transmission power of the portabletelephone set based on a result of detection of the output limitationcommand information; means for transmitting information proper to theportable telephone set to the portable telephone output limitingmanagement device under a limited transmission power; means fornotifying an incoming by a vibrator if, during an output limiting mode,the incoming signal from the portable telephone output limitingmanagement device is detected; said means detecting the actuation of anincoming reply key under output limitation mode, said means transmittinginformation on the incoming response information with limitedtransmission power to the portable telephone output limiting managementdevice.
 25. The portable telephone set as defined in any one of claims15 to 22 comprising: means for transmitting a limitation command oftransmission power to an output limiting circuit and for transmittingportable telephone set identification information and telephone numberof the portable telephone set on detection of reception of said outputlimitation command information; and means for commanding voice data tobe sent out if said voice data is pre-stored in voice message storagemeans; wherein on entrance to an output limiting mode, a state ofentrance to the output limiting mode and the portable telephone setidentification information including the portable telephone setidentification information of the portable telephone set, the portabletelephone set number, information on the reply voice message, anotification information flag for designating with which responsepattern the portable telephone output limiting management device is toreply to the call from the base station, and an incoming permission flagare sent with limited transmission power to the portable telephoneoutput limiting management device.
 26. A repeater device comprising:means for effecting relay connection of a radio channel between aportable telephone set under an output limitation mode and a basestation; and means for accepting hand-over to said portable telephoneset from a portable telephone output limiting management device asdefined in any one of claims 15 to
 22. 27. A repeater device comprising:means for having communication with a matching circuit provided in theportable telephone output limiting management device as defined in anyone of claims 15 to 22 to effect transmission/reception of informationon a vacant channel, hand-over request and hand-over acceptancepermission to accept a radio channel of the portable telephone setplaced under the output limitation mode.
 28. A portable telephone setoutput limiting system comprising: a portable telephone output limitingmanagement device for transmitting a radio wave signal of the outputlimiting command information limiting the outputting of a radio wave ofthe portable telephone set from a first antenna provided in a site whereuse of the portable telephone set is limited; wherein when the portabletelephone set enters said site to receive an output limitation commandinformation from said first antenna, an output limiting mode isinitiated to halt direct exchange with a base station to send a state ofthe portable telephone set entering into the output halting mode and theinformation proper to the portable telephone set including a portabletelephone set management number, a telephone number, a reply message ifneed be, communication information flag and incoming permission flag tothe portable telephone output limiting management device with a radiowave the transmission power of which is limited; said portable telephoneoutput limiting management device receives the information proper to theportable telephone set sent out by the portable telephone set via saidfirst antenna to update and register the contents of the information ina management table from one portable telephone set to another; saidportable telephone output limiting management device sets the portabletelephone set registered in said management table as a portabletelephone set placed under its management; there being provided a secondantenna for having radio communication with the base station; if thereis an incoming call from the base station to a portable telephone set inthe output limiting mode, reference is had to the incoming permissioninformation of said management table from the information proper to theportable telephone set; if the incoming call is permitted, the effect ofthe call incoming is advised to the portable telephone set and a messageto the effect that a call is incoming is transmitted to the base stationfor notification to the originating side.
 29. The portable telephone setoutput limiting system as defined in claim 28 further comprising: arepeater device provided in a use-permitted site for the portabletelephone set, said repeater device effecting connection between theportable telephone set and the base station, and for accepting a radiochannel of the portable telephone set placed under output limitationmode after hand-over request from the portable telephone output limitingmanagement device; and means for transmitting to said base station amessage to the effect that the portable telephone set is moving, onacceptance by the portable telephone output limiting management deviceof a response to an incoming call transmitted with a radio wave with alimited transmission power from the portable telephone set in the outputlimited mode, until the time the user of the portable telephone setmoves from the use-limited site to the use-permitted site; wherein if apre-set response signal transmitted from said portable telephone set viaa third antenna provided in the use-permitted site and which isconnected to the portable telephone output limiting management device isreceived, said portable telephone set is verified to have moved to theuse-permitted site, whereupon a command is issued for effectinghand-over to a radio channel of an antenna connected to the repeaterdevice and the issuance of the message indicating the movement ishalted.
 30. A repeater device comprising: means for receiving ahand-over command to a portable telephone set and for acceptinghand-over of the portable telephone set which has entered an area ofwhich the repeater device is in charge; and means four effecting radiochannel relaying connection between the output-limited portabletelephone set and the base station.
 31. The repeater device as definedin claim 31 further comprising: means for issuing a hand-over command toanother repeater device.
 32. A repeater device having a function ofrelaying between an output-limited portable telephone set and a basestation and which is configured for accepting hand-over of said portabletelephone set from the portable telephone output limiting managementdevice as defined in any one of claims 15 to 22, comprising: means forhaving communication via a cable or a radio path with said portabletelephone output limiting management device; different frequencies beingallotted to a radio channel adapted for having communication with theportable telephone set (termed as an inside communication channel) andsaid base station and to another radio channel adapted for havingcommunication with said base station (termed as an outside communicationchannel); a radio wave having a limited output being used forcommunication with said portable telephone set by said insidecommunication channel; means for periodically communicating theinformation on the vacant channel of said inside communication channelunder normal situation to said portable telephone output limitingmanagement device; means for sending out a network establishing requestto said base station on reception of the network establishing requestfor the outside communication channel from said portable telephoneoutput limiting management device, said means receiving a notificationto the effect that a new radio channel has been acquired at said basestation to notify the effect of acquirement of the outside communicationchannel to said portable telephone output limiting management device;and means for notifying the effect of hand-over completion to said basestation on reception of the notification of the hand-over completionfrom said portable telephone set if a hand-over command has previouslybeen issued from the portable telephone output limiting managementdevice to the portable telephone set, for switching to relayingcommunication between said portable telephone set and the base station.33. A repeater device having the function of relaying between anoutput-limited portable telephone set and a base station and which isconfigured for accepting hand-over of said portable telephone-set fromthe portable telephone output limiting management device as defined inany one of claims 15 to 22, wherein different frequencies are assignedto a radio channel adapted for having communication with the portabletelephone set (termed as an inside communication channel) and said basestation and to another radio channel adapted for having communicationwith said base station (termed as an outside communication channel); aradio wave having a limited output power being used for communicationwith said portable telephone set by said inside communication channel;the repeater device comprising: means for periodically communicatinginformation on the vacant channel of said inside communication channelunder a normal situation to said portable telephone output limitingmanagement device; means for issuing a network establishing request tosaid base station on reception of a channel connection establishingrequest for the outside communication channel from said portabletelephone output limiting management device, said means receiving anotification to an effect that a new radio channel has been acquired atsaid base station to notify an effect of acquirement of the outsidecommunication channel via said device control channel to said portabletelephone output limiting management device; and means for notifying aneffect of hand-over completion to said base station on reception of thenotification of the hand-over completion from said portable telephoneset if a hand-over command has previously been issued from the portabletelephone output limiting management device to the portable telephoneset, for switching to relay communication between said portabletelephone set and the base station.